v3.26.1
Note 10 - Stock-based Compensation Stock - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Balance, number of shares (in shares)   992,701  
Balance, weighted average exercise price (in dollars per share)   $ 11.76  
Balance, weighted average remaining contractual term (Year)   7 years 7 months 6 days 8 years
Granted, number of shares (in shares)   356,350  
Granted, weighted average exercise price (in dollars per share)   $ 4.49  
Exercised, number of shares (in shares)   (6,000)  
Exercised, weighted average exercise price (in dollars per share)   $ 2.3  
Expired, number of shares (in shares) (2,219)    
Expired, weighted average exercise price (in dollars per share) $ 184.41    
Forfeited, number of shares (in shares)   (195)  
Forfeited, weighted average exercise price (in dollars per share)   $ 5.33  
Outstanding, shares (in shares) 1,340,637 1,340,637 992,701
Outstanding, weighted average exercise price per share (in dollars per share) $ 9.59 $ 9.59 $ 11.76
Outstanding, aggregate intrinsic value $ 0 $ 0  
Exercisable, shares (in shares) 747,134 747,134  
Exercisable, weighted average exercise price per share (in dollars per share) $ 12.96 $ 12.96  
Exercisable, weighted average remaining contractual term (Year)   6 years 4 months 24 days  
Exercisable, aggregate intrinsic value $ 0 $ 0